Pipe joint



. w. REYNoLDs. I

Jan. 22,' 1929.

PIPE JOINT Filed Got. 4, 1926 MLA/ER REY/vows.

@Howell nireN WALKER REYNOLDS, OEANNISTON, ALABAMA, ASSIGNOR TU ALABAMA PIPE COM- PANY, A CORPORATION GF ALABAMA,

PIPE JOINT.

Application led Oct-ober 4, 1926. Serial No. 139,359.

This invention relates to pipe joints of either the bell-and-spigot or the substantially equivalent sleeve or collar type, and' has more particular reference to such joints in connection with which a malleable metal, such as lead, and a `fibrous material, such as jute or hemp, are cmployedtogether with some form of filler, for rendering the joint tight.

A primary object of thepresent invention is to produce a pipe 'joint of the belland` spigot or otherl equivalent type, in which the base of the bell is occupied by a filler, preferably of metal or the like, the mouth of the bell is sealed with malleable material, and fibrous material is interposed between said filler and said malleable material; and in which the surface of the filler that is opposed to the librous material is so shaped as to accentuate the tendency of said material to be forced out ward toward the inner surface of the belhand inward toward the outer surface of the spigot, when the malleable material at the mouth of the bell is callred, or otherwise similarly forced into place.

il further object is to employ for the said filler a unitary ring of substantially unyiclding material, having a substantially symmetrical, wedge-shaped edge which is adapted to be opposed to the fibrous material.`

Another object is so to design and arrange the parts comprising the joint that the filler ring may lit loosely within the bell, andinay fit loosely over the spigot, so that said parts may readily be assembled, and considerable (fletlection between adjacent lengths of pipe is j )rovided for, while at the same time said filler is adapted to prevent entrance of the fibrous material into the interior `of the pipe beyond the end of the spigot. i

And a still further object is to provide for the use at the mouth of the bell of malleable material which need not be reduced to a molten or plastic condition in order to put it in place initially.

The means by which the foregoing and other objects are accomplished by my invention, and the manner of their accomplishment, readily will be understood from the following description on reference to the accompanying drawings, in which Fig. 1 is a View of a preferred form of my improved pipe joint, half in section and half in side elevation.

Fig. 2 is a section on nthe line II-II of Fig. 1. i

As shown in the drawings, in which corresponding parts are identilied by like reference numerals throughout the severalviews, the pipe 5 is provided with a bell end (i, adapted to receive the spigot end of the pipe 8. At the base of the interior of the bell is an annular shoulder 9, having a plane face which is inclined outwardly. toward the mouth of the bell, the interior surface of the bell abo ve said shoulder being cylindrical at l10, being inclined outwardly toward the mouth ofthe bell to form a frustro-conical surface at 11, and being inclined inwardly to forni the interior flange or shoulder 1:2 at the mouth of the bell.

The filler ring 13 preferably is formed of a substantially unyielding material such as steel or cast iron, and is of one-piece construction, having a cylindrical body portion terminating at one end in an inclined surface 14, the inclination of which substantially conforms with that of the shoulder 9 at the base of the bell, and said ring terminating at its other end in a double-wedge-shaped portion 15, the faces of which preferably are inclined toward each' other at the same angle relative to the inner and outer surfaces, respectively, of the body portion of the' ring, so that said inclined faces are of substantially the same area. rlhe length ofthe filler ring preferably is such that, when its inclined surface lll is resting upon the shoulder 9 at the base of the bell, the wedge-shaped portion 15 stands at the base of the flaring surface l1.

Fibrous material 16, such as jute or hemp, is interposed between the filler ring 13 and the packing 17 of malleable metal, such as lead, at the mouth ofthe bell. lrefi-irably,

said packing is initially put in place in the form of a unitary ring, instead of being poured into the joint in a molten condition, and is subsequently tightened in place with a callring tool or the like, and thereby distorted sufliciently to lill the groove between the shoulder or interior flange 12 at the mouth of the bell and the outer part of the frustreconical surface 1l. The filler ring 13 has an interior diameter sufficiently larger than the exterior diameter of the spigot 7, and an eX- terior diameter sufficiently smaller than the interior diameter' of the bell 6, so that said ring may readily be slipped over said spigot and inserted in said bell, and the desired amount of play of the spigot in the bell is provided for, while at the same time the ller ring fills the space between the spigot (lll viiiclined shonhfler Sl of the bell; the jute oi other iibrous meterinl i6 is' tnmped into the space between the spigot andthe bell, over the wedge end of the filler ring; the patching; ring is slipped into place over the tanipcd tibrous nliltcrinh und is driven ngninst seid material, and cnlked so ne to expend it in. wni'dly against the spigot and mitwnrdly in to the groove at the mouth ol." the bellr The librous materiel is readily compressihlc, and

if toreed, by the celkng ot the lend packing, against a filler which oj'iposes :1. subetentiully pinne surface to the .librerie nniterinl, sind umteriul tends to be compacted lon( itudinally of the space in which it le confine( and to be to only u limited extent pressed unjuinst the outer snrzzee of the spigot. and the inner snrfnce oi the bell. But by the luie o't n liller which opposes n wedge-shaped surface to the tibrous materiel, compi seien of seid materiel causes it to become `wm'lggcd tightly between the wedge end 15 of the filler ring and the opposed surfaces ofthe spigot and the bell; nlso7 the extent of this` wedgingi action in the tvo directions is given the desired uniformity by the employmentol a double Wedge, the two faces of which are preferably inclined to enbstnntially the same extent and have Substantially the seme area.

It will he noted that my improved pipe joint ie not precniked, which is n term that is recognized in this art es applying to :i joint in which, before the spigot is plnced in the bell, the lend or other j'nicliing material is celkedsuliieiently to retain the filler und the ibrous material in place; but .my joint may correctly be described :is being prepared or made rendy, in the sense that the lillcr ring,` the packing ring, and the librous nniteiial7 may be assemliled in their nltinnrtc positions, after the spigot entered in the bell, without any treatment at thc time nt being nseeinhlcd, other than the milking ol the pn liingr ring Various modilicatiune ot minor dctnls ol the improvement@ disclosrd herein doubtless readily will .suggest theme-teiten to those skilled in this art, lult ,such nllnlilicntionns full. Within the scope ot my il'ivcntive ii`\g`:l1l.t und my invention is not to be crmstrued :tn being limited to any dctnls not epecilicnlly set out in the claim.

Having thus lnlly described the ilwentioin what I claim us newj and 4sceli; to scrute by Letters Patenti is A joint for bell and @spigot pipe, cmnjnisingr n rigid filler ring mounted between the hell und spigot et the bese ol? the bell and lniving its outer upper ege bcvelled from both inner and outer periphery to provide it sharp donble wedgeshnjwd etlygc7 n Wedge shaped recess formed on the inner 'hice oit' said hell adjacent to said beveled ednjc, n llnous; pliching disposed to cngz'rge snid wedge end ot the 'lille/r ring, and Vmallezil'iie l.clcingi materiel forced into the outer end of the liell to seal the joint sind tightly compact the ibron:-: peeking material against the ring and into the wedge shaped recess on euch side ot its Wedgeshnped end. A

In testimony whereof I util); my signature.

TALKER REYNOLDS. 

